Wrench-operating mechanism.



K. .DOBROWOLSKL WRENCH OPERATING MECHANI$M.

Patented Feb. 25, 1919.

APPLICAHON FILED AUGJY, I917,

KONSTANTY DOBROWOLSKI, OF SOUTH BETHLEHEM, PENNSYLVANIA.

WRENCH-OPERATING MECHANISM.

Specification of Lettprs Patent.

Patented Feb. 25, 1919.

Application filed. August 21, 1917. Serial No. 187,352.

To all whom it may concern:

Be it known that I, KONSTANTY DOBRO- woLsKI, a citizen of Russia, and resident of South Bethlehem, county of Northampton, and State of Pennsylvania, have invented certain new and useful Improvements in Wrench-Operating Mechanism, of which the following is a specification.

This invention relates to improvements in ratchets, as applied to wrenches and like implements, and has for its special object the provision of means whereby a variety of mechanics tools, such as dies, taps, drills, jacks, and the like may be conveniently operated in either direction and within a contracted space.

This and other like objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawings forming a material part of this specification and in which Figure 1 is a plan view showing a ratchet wrench made in accordance with the invention and indicating its application.

Fig. 2 is a longitudinally sectional View taken substantially on line 22 of Fig. 1.

Fig. 3 is a sectional view taken in a different plane on line 33 of Fig. 2.

Fig. 4 is a perspective view of the engaging means by which the work parts are held within the holder.

In its simplest form the apparatus is comprised of a holder 25 having a bored annular opening 26 and a oounterbore 27 for the reception of the objects to be operated upon, the same resting upon the ledge 28, surrounding the bore 26 and is further formed with an annular recess 29, containing a curved wire 30 having extending ends 31, the same being operable through a recess- 32 formed in an extension 85, of the holder 25, a similar, lesser extension 36, being oppositely disposed and containing a screw threaded opening 37.

In the extension 35 is an opening 38, in which is pivoted, by the pins 39, a pair of oppositely disposed dogs, respectively 40 and 42, the interior ends of which pass through slots formed in the holder 25, the outer ends being held in normal separated position by means of the spring 43, the same pressing the points of the dogs inward toward the opening 26.

Formed with the extension 35 is a reduced projection 45 engaged with which is a spring 46, the opposite end of the spring encircling a projection 47, of a handle bar 48, which may be furnished with a screw driver blade 49 at its outer end, and has set in it a pin 50, engageable within the reentrantly turned end 51, of a slot 52, formed in the manner of a bayonet joint, inthe tubular handle 54 to which the bar 48 is fitted, the handle being engaged at its inner end with the extension 35 in such manner as to limitedly rotate thereon, the amount being controlled by the screw 56, rigidly set in the extension, its head passing out through a semi-annular slot 57 formed in the handle 54.

The inner or head end of the tubular handle 54 is cut away so as to form beveled lips 58, adapted to engage with the extending ends of the dogs 40 and 42, so that either may be made operative with respect to the article contained in the holder 25, or, if the holder be in a neutral position, both of the dogs are engaged with the article.

Thus the dogs may be moved in either direction as the handles are operated.

When it is desired to use the implement with both hands, the handle bar 48 may be withdrawn by proper manipulation in relation to the bayonet joint, and the screw end 47 engaged in the opening 37, of the projection 36, so that handles extend at both ends of the holder.

From the foregoing it will be seen that an implement capable of a wide range of adaptation has been presented and which, taken in connection with the drawings, should be clearly understood.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is-

In a wrench of the character described, the combination with a. circular holder having opposite extensions, of a tubular handle engaged with one of said extensions, a curved wire having extended ends operable through a recess in said extension, a reduced projection on said extension, a bar in said handle being engageable with the other of said extensions, a projection on the inner end of said bar, a spring engaging with one of its ends the projection on said extension and with the other the projection on said making either dog operative with respect to 10 the article contained in the holder and both dogs adapted to engage the article in the neutral position of the holder, substantially as described and for the purpose set forth.

In testimony whereof I have aflixed my 15 signature.

KONSTANTY DOBROWOLSKI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

